BIQU B1 Part Ejector

This part ejector is great if you want to automate your BIQU B1 to run 24/7! You will also need to:
-Use my Y axis belt cover to prevent parts getting caught in the belt: https://www.thingiverse.com/thing:4981059
-Use a bed clearing script at the end of your G-code (or for OctoPrint users, use the 'continuous print' plugin). Mine is listed at the end of this text.
-Change your start G code to prime off the edge of the bed to prevent build up of filament. Mine is listed at the end of this text.

This works well with this BL touch mount: https://www.thingiverse.com/thing:4564987

Bed Clearing Script:
M140 S0 ;turn off heated bed
G4 S1800 ;wait for 30 mins
M17 ;enable steppers
G90 ;back to absolute positioning
G28 X Y ;home XY
G1 X119 Y238 F6000 ;move to centre back
G1 Z1 F2000 ;move Z down
G1 Y40 F1000 ;eject
G1 Y238 F6000 ;return to back
G1 X79 F6000 ;move left -40
G1 Y40 F2000 ;eject
G1 Y238 F6000 ;return to back
G1 X159 F6000 ;move right +40
G1 Y40 F2000 ;eject
G